I started rattling in the beginning of October in certain places. You need to let the bucks behavior in your area dictate when you should rattle or call for that matter IMO. Rattling does not always work in all places in all situations. You need to see and observe how the deer react and act to let you know.
Just a tip. When the weather turns cold like it did the other day. The Bucks become a lil rev’d up, restless, less tolerable of each other and are more acceptable to calls. Also Buck to Doe ratio also plays a big part if rattling is effective. There is no blanket statement that works for all places or situations. Each deer has different personalities much like humans. Some are fighters, some are lovers.
I have rattled 2 bucks in this year both were smaller 1.5-2.5 year olds. Once was going away from me and I visually saw him and rattled him back into me. The other was a blind rattle sequence and one showed up curious and looking.
Hope this helps and Welcome To In-Depth Outdoors.